\documentclass{standalone}
	
\usepackage[siunitx]{circuitikz}

\begin{document}

\begin{circuitikz}[scale=1.5, transform shape]
\draw (0,0) node[anchor=east] {$n2$};
\draw (0,0) to [american voltage source=V, i<=i, o-o] (0,3);
\draw (0,3) node[anchor=east] {$n1$};
\end{circuitikz} 

\end{document}
